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Valgrim

895 karma · joined May 28, 2019

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Valgrim··on Ask HN: Which low-budget camera would you recommend for recording podcasts?
Sorry,I'm confused. Aren't podcasts audio by definition?

Unless your audience is going to be mainly on a video platform (and even then, the following advice will apply) you should focus your budget on audio equipment, and possibly build a recording booth.

Valgrim··on Florida Passes Law Banning Social Media for Minors Under 14
About point 2: in my neighborhood there's half a dozen kids, all aged 5-8, all communicating constantly during weekends using cheap, loud FRS walkie talkies some parent bought in a 10-pack off Amazon.

My point being that even without internet, or even without knowing how to type and barely able to read, social networks just pop into existence.

Valgrim··on Giant 'sand battery' holds a week's heat for a whole town
Some Youtube folks tried a much simpler approach:

Take a large metal bucket or barrel.

Put a heating element and a simple oven thermostat on the bottom.

Fill with sand.

Connect to a solar panel or other enrgy source.

The air between the sand particles seem to actually provide a bit of convection and insulation.

The thermostat turns the circuit off before getting too hot for the heating element.

The heat accumulated during the day is slowly released over time directly through the metal.

Valgrim··on Show HN: Timelock.dev – Send a secret into the future using timelock encryption
One could build a service just around the fact that the fastest theorical time it takes to transmit information around earth is around 130ms. This means that the absolute maximum number of layers that could be used in a day is well below 1 million. Scale that over a few billion layers or more, and reveal a new key every roundtrip, and you would've got yourself a much simpler timelock encryption.

The problem that arise is (and which is solved by the spacecraft to Neptune) is that with any earth based system, someone could secretly move copies of both ends closer together, secretly, and decrypt the lock faster than expected. Putting a spacecraft on a trajectory with no realistic chance of ever coming back makes this possibility impossible (as long as the layers of keys are encrypted only when the spacecraft arrived at its destination. Even if the delay between earth and neptune vary wildly, it is predictable, and any local system could piggyback a larger scale system like this for safety

Valgrim··on Scientists Confirm the World Now Has over 1B Obese People
Tangent; if there was a nuclear war and subsequent global famine, would the obesity epidemic turn out to be a blessing, allowing more people to survive the initial winter?
Valgrim··on Hopes for Finding Mars Life After Rover's Ground-Penetrating Radar Discovery
We're not even sure there's no life on the moon. There could be liquid water in deep underground lakes and there would be no sign of it on the surface.
Valgrim··on Show HN: WhisperFusion – Low-latency conversations with an AI chatbot
In order to feel like a human, cues should not be a pre-programmed phrase, the system should continuously listen to the conversation, and evaluate constantly if speaking is pertinent at that particular moment. Humans will cut a conversation if it's important, and such a system should be able to do the same.
Valgrim··on I used to not worry about climate change. Now I do [video]
Modern farms are highly dependent on global infrastructure for things like fuel and fertilizer and fuel.

If personal resilience is your goal, then you must look into permaculture, no-till and agroforestry.

Valgrim··on Do they have humans test cars before they produce them or what?
It would seem more logical to me if the regenerative braking was tied to a physical user input. Like... the brake pedal from 0 to 30% could be regenerative, and beyond that engage the brake discs. Or it could be tied to the shift stick, on a L-D position, acting like a low gear on a manual car.
Valgrim··on Wind turbines are friendlier to birds than oil-and-gas drilling
Not just that, rivers overheating is becoming a real problem now in places that were perfectly fine 40 years ago.
Valgrim··on Heat pump users noticing cheaper bills and warmer homes – study
Don't forget heat recovery ventilation.

The house I bought used originally a wood furnace which created a good draft of fresh air from the walls by sucking the ambient air into the chimney. Once the furnace had been replaced by an electric system (first radiator then heat pump), the air became stale in the house, causing all sorts of incomfort and humidity issues.

Valgrim··on Westworld: The first film with CGI (and its source code)
At some point in the show William gets shot at, it hurts but it doesn't break the skin, so somehow the bullets have a variable speed controlled by computers.

There's also a short scene in the show where two humans are talking. One of them takes his knife out in an intimidating way and in a split second the closest host just takes the sharp part of the knife in his hand and put it in the table, so even melee weapons can't hurt real humans.

Valgrim··on A circular 3D-printed concrete bridge
The structure is purely a demonstration. It appears to be built on the company's ground, so there's a lot less red tape and they can show it off to potential buyers easily. Also the area is flat and has no natural obstacles like a river, with a low population density (it's actually near Lyon's main airport) so it's less likely that vandalism or accidents could cause damage to the structure.
Valgrim··on 2TB microSD card is on the way early next year
Still useful to carry around an entire copy of wikipedia, continent-wide OSM maps, and large libraries of movies, retro games and audiobooks. In other words, perfect for someone who travels frequently with kids.
Valgrim··on Simulating fluids, fire, and smoke in real-time
Now that LLMs run on GPU too, future GPUs will need to juggle between the graphics, the physics and the AI for NPCs. Fun times trying to balance all that.

My guess is that the load will become more and more shared between local and remote computing resources.

Valgrim··on Project Lyra: sending spacecraft to chase Oumuamua using Sun for Oberth maneuver
If those objects happen to be more frequent than expected, I think we should envision a way to send small probes with the ability to slowly mine their resources and build things like larger communication antennas or telescope mirrors using in-situ materials, taking advantage of their great mass and speed to create much bigger structures than we could reasonably send out there
Valgrim··on 10,000TB storage cartridges could become mainstream by 2030
I understand some of these words.
Valgrim··on 10,000TB storage cartridges could become mainstream by 2030
At this scale, does it really matter? Right now everything I record in the cloud has an infinite history attached to it, so nothing is ever really "deleted" as I understand it, the index merely points to the latest version of a file.

If the deletion is meant as a security feature, then you can "delete" a file by making it encrypted and deleting it's decryption key.

Valgrim··on After OpenAI's blowup, it seems pretty clear that 'AI safety' isn't a real thing
Who said anything about robots? Critical infrastructure is made of computers, controllers, pumps, power lines, network switches, antennas etc, that are all controlled by software of some kind.

Even completely air-gapped hardware is controlled by humans, and social engineering is where Hal can reaally shine. Blackmail, manipulation, corruption, misdirection require no physical existence at all..

Valgrim··on After OpenAI's blowup, it seems pretty clear that 'AI safety' isn't a real thing
Step 1: AGI (let's call him Hal) is instructed to act as an adversarial agent to a state.

Step 2: Hal research and uses every trick and exploits known to men to infiltrate critical infrastructures like telecommunications, power grids and private corporations of said country. Hal actively search and discover zero-day exploits on every known piece of hardware and software. Hal keeps mostly invisible at this stage, ensuring to leave as little trace as possible.

Step 3: When ready, Hal wreaks havoc, disabling critical infrastructures, shutting down power grid or worse, overloading it to break as many physical systems as possible. Hal complicates coordination by impersonating real people, swamp the infosphere with fake but realistic data.

This vould all be made by humans, but while a single human takes years to train, Hal can be replicated as much as needed.

Valgrim··on Bard Extensions
Okay so after 8 months, after being released in 48 languages and 238 countries, for some reason, Bard still isn't available in Canada?

This has to be a joke.

Valgrim··on A City on Mars: Reality kills space settlement dreams
I like your vibe.

Regarding your last suggestion, what you actually want is a skyhook to catch the payload, with Phobos at the center. You can even use Phobos regolith to manufacture the basalt fiber required to build the cable.

Valgrim··on Why do people still use VBA?
I agree, and I'll add this: these people are not exactly bored, they're just the type of people that see a problem, a solution, and got the time to connect them together. Now I think the best attitude toward that particular type of people is to encourage good practices instead of mocking or shutting it down
Valgrim··on Why do people still use VBA?
Are entire VBA projects really that ubiquitous? As far as I can see, there are really two category of those: first are the huge proprietary plugins from large B2B companies that serve as a way to deeply integrate their products into Excel Spreadsheets, and the second are more like extremely customized tools built by the enthusiastic tinkerer of a non-technical team to make a complex and repetitive task easier.

If there's a third category, please enlighten me

Valgrim··on Implementing Tic Tac Toe with 170mb of HTML – No JavaScript or CSS
Wow, someone actually implemented Apu's thesis in the real world.

link: https://m.youtube.com/watch?v=UOAdGjj-hIg

Valgrim··on Using GPT-4 Vision with Vimium to browse the web
I worked with a client who used a multi-millon dollar system for moving goods automatically into packaging stations. The system was built and maintained by a major european company. All the data was transfered automatically between systems normally, but one day, for some reason, there was an internal communication error inside the machine which caused a lot of packages to be sent without being recorded as such.

Now normally we would just have contacted the company and asked them for a data extraction so we could cross-reference the data. But since it wasn't clear who was at fault, and we knew it would take weeks for that extraction, we looked for an internal solution first.

Now there was a subsystem in the machine that worked only in Internet Explorer, with an old authentication scheme, that we could use to see the information we needed, so I, being the only person in the team without formal analysis training but having made my way there from a clerk job, knew exactly what to do.

I fired up the old IE, Excel, wrote in 5 minutes a VBA script that did exactly what you described, click there copy that etc, and 30 minutes later we had our extraction, and resolved the issue completely before the packages were even shipped.

All hail Excel.

Valgrim··on The Potato Hack
"Potatoes get a bad reputation as a fattening food when in reality they have the highest satiety rating of any food on the planet"

The author doesn't claim potatoes are low calorie, he says calorie for calorie, potatoes make you feel more full.

I can see it, eating one large potato will make me feel full longer than eating twice as many apples.

Valgrim··on SpaceX poised for 'mid-November' launch of second Starship test flight
What would be needed to have a significantly better space telescope than the JWST? A monolithic mirror might be an good improvement, but we would still be limited by the size of the fairing.

Even better than that would be to create and grind the mirror directly in space, but this would require orbital manufacturing abilities. And this means big infrastructures, so big launches.

Or maybe we need to send a telescope a few hundred AU away from the sun tp make a solar gravitational telescope! Once again, big rocket required.

JWST is a fine telescope, but the bottlenecks we face going forward require better launching capacity.

Valgrim··on SpaceX poised for 'mid-November' launch of second Starship test flight
My guess is that for the most part, the moon or mars will remain uninhabited. It will eventually become a source for mining and launching cheaply trillions of tons of materials. Humans will only really "colonize" huge castles that can house billions, gigantic structures assembled in space from lunar materials and launched from magnetic rails, bit by bit, assembled directly in their useful orbits (cyclers maybe?). With bigger and bigger mirrors and solar panels pointed at the sun, there would probably be no limit at the distance those could be from the sun.
Valgrim··on Aerogel Core Fission Fragment Rocket Engine
Last I heard of it you dont need to slow it down, the concept starts working at SGL distance, but it works fine beyond that. In any case at that distance you need a chain of communication relays which themselves can carry telescopes pointing at the sun.
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